Extraction Of Caffeine From Tea Leaves Lab Report Pdf

Organic chemistry ii lab report 2 page 1 work completed.

Extraction of caffeine from tea leaves lab report pdf. Highlighted concepts components of tea leaves cellulose the major structural material of all plants caffeine one of the major water soluble substances present in tea leaves tannins high molecular weight water soluble compounds that are responsible for the color of tea flavonoid pigments a naturally occurring water soluble phenolic compound. 2014 extracted caffeine from used leaves of green white black as well as red tea and found maximum caffeine content 60 mg 100 g in green tea and minimum in red tea 3 mg 100. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solubility of caffeine is 22 mg ml 25 c and 670 mg ml 100 c.

Isolation of caffeine from tea leaves via acid base liquid liquid extraction andra postu october 6 2013 lab partner. Caffeine lab 1 isolation of caffeine from tea in this experiment caffeine will be extracted from tea leaves where it is about 5 present using hot water. For example coffee is a liquid which contains dissolved caffeine. Use hot water to extract the caffeine from the tea leaves.

Caffeine was extracted from tea by the use of solid liquid and liquid liquid extractions. Use an organic solvent to extract the caffeine and related compounds from the water. Tea 30 75 mg per cup cocoa 5 40 mg per cup milk chocolate 6 mg per ounce baking chocolate 35 mg per ounce coca cola 46 mg per 12 ounces excedrin extra strength 65 mg per tablet no doz 100 mg per tablet experiment 6 isolation of caffeine from tea leaves introduction caffeine is a member of the class of compounds organic chemists call. This work was planned to improve a green extraction technique to.

This is essentially the same procedure used to decaffeinate drinks such as coffee and tea. Separation of caffeine and catechins from tea extracts usually requires conventional liquid liquid extraction employing chloroform. Procedure add about 10 0 g of tea leaves to around 100 ml of water in a 400 ml beaker cut open. An acid base liquid liquid extraction took place in order to force caffeine into the.

Extraction is one of the common methods used to extract caffeine from cocoa seed on a laboratory scale. Isolating caffeine from tea abstract caffeine was extracted from instant tea and purified by recrystallization. Extraction is a technique in which a solvent is used to remove isolate a compound of interest from a liquid substance. While cellulose is insoluble in the water the tannins and chlorophyll will extract along with the caffeine into the water.